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2 Discussion Topics What is Interactive Distributed Generation? How can IDG be used as a DR Tool? Why Employ IDG in the DR Tool Set? Making IDG Happen

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3 What is IDG? Use of a Customers on-site distributed generation (DG) for DR purposes DG size typically 250-5,000kW Employ Reciprocating Engine Technology Single or multiple engine generators Connected to the distribution system Interactive (the I in IDG) DG is under Utility control for a DR call DG is monitored for reliability

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15 Sustainability The amount of demand reduction can be precisely matched with the proper amount of dispatched IDG Maximum efficiency of each IDG is maintained IDG can be started and fully loaded within 30 seconds Only small amounts of fuel are consumed without realizing power output and demand/load reduction. IDG are considered spinning reserve while stopped! Tremendous Green House Gas Savings and Carbon Footprint Reduction Avoids 15% Reserve Capacity Over-Build Requirement

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16 Sustainability IDGs can operate as bi-fuel Use mixtures of diesel and clean-burn natural gas to reduce emissions IDGs can utilize waste methane and biodiesel IDGs can be fitted with selective catalytic reduction (SCR) to further limit emissions in regions where emissions are restricted This is true for new installations and retrofitting of existing engine/gensets IDG can be applied to firm Renewables

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Availability, Firmness, Reliability Many IDGs have greater reliability than a small group of CTs A failure of one or even a few IDGs only impacts the demand reduction capability associated with those failed systems…...the others relieve load. IDG systems have an availability of over 96.5% [1] CTs have typically an availability rate of 90-95% [2] Monitoring keeps availability high IDGs can pick up load in 30 seconds IDGs use control implementations that will pick up as much of a Customers load as the generation will allow Dynamic setpoint for non-export [1] PowerSecure operating experience from >850MW of aggregated IDG [2] European Commission Research; ftp://ftp.cordis.europa.eu/pub/eesd/docs/ev260901_poster_came-gt.pdf